Chair leg welding tool

Abstract

The utility model relates to the technical field of chair leg production equipment, in particular to a chair leg welding tool. According to the chair leg welding tool, a center rod body is arranged in the center of a bottom plate, and the center rod body is sleeved with a center circular ring of a chair leg; the left clamping block and the right clamping block are fixedly connected with the bottom plate, an air cylinder and a first air pipe are arranged on the right clamping block, and the air cylinder communicates with the switching mechanism through the first air pipe; the switching piece is arranged on the bottom plate, the switching piece is communicated with the air storage cylinder through a second air pipe, an output shaft of the air cylinder is connected with an abutting piece, and the chair legs are placed between the left clamping block and the abutting piece; the on-off switching rotating rod is arranged on the switching piece; when the switching rotating rod is switched on and off to enable the switching piece to be in a channel, the air storage cylinder and the air cylinder form a channel through the first air pipe and the second air pipe, and the abutting piece and the left clamping block abut against the chair legs; when the switching rotating rod is switched on and off to enable the switching piece to be in an open circuit state, the air cylinder is disconnected from the air cylinder, and the abutting piece is separated from the left clamping block. The device effectively improves the working efficiency.

Description

Technical Field

[0001] This utility model relates to the field of chair leg production equipment technology, specifically to a chair leg welding fixture. Background Technology

[0002] In the chair leg manufacturing industry, welding has always been a key challenge. Previously, chair leg welding relied on manual labor, with outdated tooling resulting in cumbersome and inefficient operations. Taking multi-legged chairs as an example, the old tooling required workers to manually operate clamps to secure the chair legs in preparation for welding. This has obvious drawbacks: in terms of efficiency, manual clamping is slow, slowing down the production cycle and reducing the output of finished chair legs per unit time; in terms of worker condition, prolonged high-intensity, high-precision manual operation easily leads to fatigue, resulting in frequent operational errors, such as problems with clamping force and position, causing quality issues like loosening and misalignment after welding, increasing the defect rate; different workers have varying skill levels, and even when operating according to the same specifications, the quality of finished products fluctuates greatly, making it difficult to achieve uniform standards, affecting market reputation, and hindering large-scale, standardized, and efficient production. In short, the old manual chair leg welding tooling model restricts enterprise development and urgently requires breakthroughs in new technological solutions.

[0003] Therefore, this application aims to provide a chair leg welding device that can automatically clamp the chair legs according to their shape. Utility Model Content

[0004] To address the aforementioned issues, a chair leg welding fixture is provided. This fixture consists of a left clamping block and a right clamping block. A cylinder is mounted on the right clamping block, and the output shaft of the cylinder is connected to a clamping component. Driven by the cylinder, the clamping component can securely clamp the chair leg. A switching mechanism is also provided to adjust the clamping state. This solution addresses the problem of cumbersome and inefficient operation for workers due to the previous reliance on manual welding of chair legs.

[0005] To address the problems of existing technologies, this utility model provides a chair leg welding fixture, including a welding torch, a base plate, a clamping mechanism, and a central rod. The central rod is positioned at the center of the base plate, and the central ring of the chair leg is fitted onto the central rod. The clamping mechanism includes a left clamping block, a right clamping block, and a switching mechanism. The left and right clamping blocks are fixedly connected to the base plate, and the right clamping block is equipped with a cylinder and a first air pipe. The cylinder is connected to the switching mechanism via the first air pipe. The switching mechanism includes an air storage cylinder, a switching component, and a second air pipe. The system includes an on / off switching lever; a switching element is mounted on the base plate and connected to an air reservoir via a second air pipe; a clamping element is connected to the output shaft of the cylinder; and the chair leg is positioned between the left clamping block and the clamping element. The on / off switching lever is mounted on the switching element. When the on / off switching lever causes the switching element to be in the open circuit state, the air reservoir forms a circuit with the cylinder via the first and second air pipes, and the clamping element abuts against the chair leg against the left clamping block. When the on / off switching lever causes the switching element to be in the closed circuit state, the air reservoir disconnects from the cylinder, and the clamping element separates from the left clamping block.

[0006] Preferably, a connector is provided under the base plate, and the base plate is fixedly connected to the central rod through the connector.

[0007] Preferably, the lower end of the left clamping block is provided with a support member for supporting the chair legs.

[0008] Preferably, a limiting mechanism is provided on the base plate; the limiting mechanism includes a threaded rod, an anti-detachment component, and a limiting component; a placement groove is provided on the central rod body, and the central ring of the chair leg is sleeved on the central rod body through the placement groove; the threaded rod is provided at the top of the central rod body, and an anti-detachment slot is provided on the anti-detachment component, which is sleeved on the threaded rod through the anti-detachment slot; a first threaded hole is provided on the limiting component, and the limiting component is threadedly connected to the threaded rod through the first threaded hole; when the limiting component and the anti-detachment component are pressed together, the anti-detachment component fixes the central ring of the chair leg.

[0009] Preferably, a stabilizing mechanism is provided on the base plate; the stabilizing mechanism includes a stabilizing base and a first bolt, the stabilizing base is provided on the base plate; a through hole is provided on the stabilizing base, and the first bolt is inserted into the stabilizing base through the through hole; when the chair leg abuts against the central ring, the first bolt abuts against the end of the chair leg away from the central ring.

[0010] Preferably, a return spring is fitted onto the first bolt.

[0011] Preferably, a nut is threaded onto the end of the first bolt that protrudes from the hole.

[0012] Preferably, the sturdy base has a strip groove, and the base plate has a second threaded hole, in which a second bolt is threadedly connected; the second bolt passes through the strip groove and is threadedly connected to the second threaded hole.

[0013] The advantages of this utility model compared to the prior art are:

[0014] This utility model includes a switching mechanism. By operating the on / off switching lever, the contact and separation of the clamping part and the left clamping block with respect to the chair leg can be conveniently controlled. This changes the inefficient method of manually operating each clamp to clamp the table leg in the prior art, greatly improving the efficiency of fixing and disassembling the chair leg and saving time for subsequent welding operations.

[0015] 2. This utility model is equipped with a variety of auxiliary fixing structures, such as the connecting parts under the base plate to stabilize the central rod in the center of the base plate, laying the foundation for the welding of the chair legs; the support parts at the lower end of the left clamping block to provide additional support for the chair legs; and there are also limiting mechanisms, stabilizing mechanisms, etc., which ensure the stability of the chair legs during the welding process from multiple angles, avoid affecting the welding accuracy due to uneven force or swaying in the air, and effectively improve the welding quality.

[0016] 3. In this utility model, a return spring is fitted on the first bolt, which can adapt to different specifications of chair legs and keep it in contact with the chair legs at all times; the nut can adjust the compressible length of the first bolt and prevent it from coming out; the strip groove cooperates with the second bolt to adjust and stabilize the position of the base, which enhances the versatility and adaptability of the tooling to different chair legs. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of a chair leg welding fixture according to this utility model.

[0018] Figure 2 This is a top view of a chair leg welding fixture according to this utility model.

[0019] Figure 3 This is a three-dimensional schematic diagram of the clamping mechanism of a chair leg welding fixture according to this utility model.

[0020] Figure 4 This is a three-dimensional schematic diagram of the limiting mechanism of a chair leg welding fixture according to this utility model.

[0021] Figure 5 This is an exploded view of the stabilizing mechanism of a chair leg welding fixture according to this utility model.

[0022] Figure 6 This is a three-dimensional schematic diagram of the second bolt of a chair leg welding fixture according to this utility model.

[0023] The following components are labeled in the diagram: 1. Base plate; 2. Clamping mechanism; 21. Left clamping block; 22. Right clamping block; 221. Cylinder; 222. Clamping component; 223. First air pipe; 23. Switching mechanism; 231. Switching component; 232. Second air pipe; 233. On / off switching rod; 3. Central rod; 31. Connecting component; 4. Support component; 5. Limiting mechanism; 51. Threaded rod; 52. Anti-detachment component; 521. Anti-detachment slot; 53. Limiting component; 6. Stabilizing mechanism; 61. Stabilizing base; 62. First bolt; 63. Return spring; 64. Nut; 65. Strip groove; 66. Second bolt. Detailed Implementation

[0024] To further understand the features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments.

[0025] Reference Figures 1-6As shown: A chair leg welding fixture includes a welding torch, a base plate 1, a clamping mechanism 2, and a central rod 3; the central rod 3 is located at the center of the base plate 1, and the central ring of the chair leg is fitted onto the central rod 3; the clamping mechanism 2 includes a left clamping block 21, a right clamping block 22, and a switching mechanism 23; the left clamping block 21 and the right clamping block 22 are fixedly connected to the base plate 1, and the right clamping block 22 is provided with a cylinder 221 and a first air pipe 223, the cylinder 221 being connected to the switching mechanism 23 through the first air pipe 223; the switching mechanism 23 includes an air storage cylinder, a switching element 231, a second air pipe 232, and an on / off switching lever 233; the switching element 231 is provided with... Placed on the base plate 1, the switching component 231 is connected to the air storage cylinder through the second air pipe 232. The output shaft of the cylinder 221 is connected to the abutment 222. The chair leg is placed between the left clamping block 21 and the abutment 222. The on / off switching lever 233 is set on the switching component 231. When the on / off switching lever 233 makes the switching component 231 in the open circuit, the air storage cylinder forms a passage with the cylinder 221 through the first air pipe 223 and the second air pipe 232. The abutment 222 abuts against the chair leg with the left clamping block 21. When the on / off switching lever 233 makes the switching component 231 in the open circuit, the air storage cylinder is disconnected from the cylinder 221, and the abutment 222 separates from the left clamping block 21.

[0026] In existing technologies, each clamping device needs to be manually operated to clamp the table legs, resulting in low efficiency. To address this issue, when this chair leg welding fixture is in operation, the central ring of the chair leg is first fitted onto the central rod 3 at the center of the base plate 1 for initial positioning. Next, the cylinder 221 on the right clamping block 22 is connected to the switching mechanism 23 via the first air pipe 223. The switching element 231 in the switching mechanism 23 is mounted on the base plate 1 and connected to the air storage cylinder via the second air pipe 232. When the switching lever 233 is operated to open the switching element 231, the gas in the air storage cylinder can sequentially reach the cylinder 221 via the second air pipe 232 and the first air pipe 223. The gas drives the output shaft of the cylinder 221 to move, and the cylinder 221 outputs gas. The abutment 222 connected to the shaft moves accordingly, and the chair leg is placed between the left clamping block 21 and the abutment 222. At this time, the abutment 222 and the left clamping block 21 abut against the chair leg, firmly fixing the chair leg and facilitating subsequent welding operations. When the switching lever 233 is operated to disconnect the switching element 231, the air passage between the air storage cylinder and the cylinder 221 is disconnected, the cylinder 221 loses gas power, and the abutment 222 separates from the left clamping block 21, allowing the welded chair leg to be removed.

[0027] Reference Figure 1 and Figure 2 As shown: A connector 31 is provided under the base plate 1, and the base plate 1 is fixedly connected to the central rod 3 through the connector 31.

[0028] The connector 31 under the base plate 1 fixes the base plate 1 to the central rod 3, so that the central rod 3 is stable in the center of the base plate 1, laying the foundation for the welding of the chair legs.

[0029] Reference Figure 3 As shown: The lower end of the left clamping block 21 is provided with a support member 4 for supporting the chair legs.

[0030] The support member 4 provides additional support to the chair leg from below, and together with the left clamping block 21 and the clamping member 222, assists in clamping and fixing the chair leg, so that the chair leg remains stable during the welding process and avoids affecting the welding accuracy due to uneven force or swaying in the air.

[0031] Reference Figures 1-4 As shown: A limiting mechanism 5 is provided on the base plate 1; the limiting mechanism 5 includes a threaded rod 51, an anti-detachment component 52, and a limiting component 53; a placement groove is provided on the central rod body 3, and the central ring of the chair leg is sleeved on the central rod body 3 through the placement groove; the threaded rod 51 is provided at the top of the central rod body 3, and an anti-detachment slot 521 is provided on the anti-detachment component 52, which is sleeved on the threaded rod 51 through the anti-detachment slot 521; a first threaded hole is provided on the limiting component 53, and the limiting component 53 is threadedly connected to the threaded rod 51 through the first threaded hole; when the limiting component 53 and the anti-detachment component 52 are pressed together, the anti-detachment component 52 fixes the central ring of the chair leg.

[0032] In the limiting mechanism 5 on the base plate 1, the central ring of the chair leg is mounted on the central rod 3 through a placement groove. The threaded rod 51 is located at the top of the central rod 3. The anti-detachment component 52 is fitted onto the threaded rod 51 through the anti-detachment slot 521. The limiting component 53 is threadedly connected to the threaded rod 51 through the first threaded hole. When the limiting component 53 is rotated to move along the threaded rod 51 and abut against the anti-detachment component 52, the central ring of the chair leg is fixed by means of the anti-detachment component 52, so that the chair leg remains stable in the welding fixture and is convenient for welding operations.

[0033] Reference Figures 1-6 As shown: A stabilizing mechanism 6 is provided on the base plate 1; the stabilizing mechanism 6 includes a stabilizing base 61 and a first bolt 62. The stabilizing base 61 is provided on the base plate 1; a through hole is provided on the stabilizing base 61, and the first bolt 62 is inserted into the stabilizing base 61 through the through hole; when the chair leg abuts against the central ring, the first bolt 62 abuts against the end of the chair leg away from the central ring.

[0034] When the chair leg is placed and abuts against the central ring, the first bolt 62 can then abut against the end of the chair leg away from the central ring, thus the chair leg is firmly fixed from both ends by the central ring and the first bolt 62.

[0035] Reference Figure 5 and Figure 6 As shown: A return spring 63 is fitted onto the first bolt 62.

[0036] The return spring 63 is located between the stable base 61 and the first bolt 62. When the specifications of the chair legs are different, the return spring 63 on the first bolt 62 is compressed, so that the first bolt 62 always remains in contact with the chair legs.

[0037] Reference Figure 5 and Figure 6 As shown: The first bolt 62 has a nut 64 threadedly connected to one end of the hole.

[0038] The nut 64 is threadedly connected to the first bolt 62. By rotating the nut 64, the compressible length of the first bolt 62 can be adjusted, and the first bolt 62 can also be prevented from coming out of the through hole.

[0039] Reference Figure 5 and Figure 6 As shown: A strip groove 65 is provided on the stable base 61, and a second threaded hole is provided on the base plate 1. A second bolt 66 is threadedly connected in the second threaded hole; the second bolt 66 passes through the strip groove 65 and is threadedly connected to the second threaded hole.

[0040] When it is necessary to adjust the position of the stabilizing base 61, move the stabilizing base 61 along the strip groove 65. After moving it to the required position, screw the second bolt 66 into the second threaded hole to fix the position of the stabilizing base 61.

[0041] When the chair leg welding fixture is in operation, the central ring of the chair leg is first placed on the central rod 3 at the center of the base plate 1 for initial positioning. Next, the cylinder 221 on the right clamping block 22 is connected to the switching mechanism 23 via the first air pipe 223. The switching element 231 in the switching mechanism 23 is mounted on the base plate 1 and connected to the air storage cylinder via the second air pipe 232. When the switching lever 233 is operated to open the switching element 231, the gas in the air storage cylinder can sequentially reach the cylinder 221 via the second air pipe 232 and the first air pipe 223. The gas drives the output shaft of the cylinder 221 to move, and the cylinder 221 outputs gas. The clamping member 222 connected to the shaft moves accordingly, and the chair leg is placed between the left clamping block 21 and the clamping member 222. At this time, the clamping member 222 and the left clamping block 21 abut against the chair leg, firmly fixing the chair leg and facilitating subsequent welding operations. When the switching lever 233 is operated to disconnect the switch 231, the air passage between the air reservoir and the cylinder 221 is disconnected, the cylinder 221 loses its gas power, and the clamping member 222 separates from the left clamping block 21, allowing the welded chair leg to be removed. The connecting member 31 under the base plate 1 fixes the base plate 1 to the central rod 3, making the central rod 3 stable in the center of the base plate 1, laying the foundation for the welding of the chair leg. The support member 4 provides additional support force to the chair leg from below, working with the left clamping block 21 and the clamping member 222 to assist in clamping and fixing the chair leg, keeping the chair leg stable during the welding process and avoiding uneven force or swaying due to suspension, which could affect the welding accuracy. The central ring of the chair leg is mounted on the central rod 3 via a slot. A threaded rod 51 is positioned at the top of the central rod 3. An anti-detachment component 52 is fitted onto the threaded rod 51 via an anti-detachment slot 521. A limiting component 53 is threadedly connected to the threaded rod 51 via a first threaded hole. When the limiting component 53 is rotated to move along the threaded rod 51 and abut against the anti-detachment component 52, the central ring of the chair leg is fixed by the anti-detachment component 52, thus keeping the chair leg stable in the welding fixture for easy welding operations. When the chair leg is placed and abuts against the central ring, the first bolt 62 can then abut against the end of the chair leg away from the central ring. In this way, the chair leg is firmly fixed from both ends by the central ring and the first bolt 62. A return spring 63 is positioned between the stable base 61 and the first bolt 62. When the specifications of the chair leg are different, the return spring 63 on the first bolt 62 is compressed, ensuring that the first bolt 62 always abuts against the chair leg. Nut 64 is threadedly connected to the first bolt 62. Rotating nut 64 can adjust the compressible length of the first bolt 62 and also prevent the first bolt 62 from coming out of the through hole. When it is necessary to adjust the position of the stabilizing base 61, move the stabilizing base 61 along the strip groove 65. After moving it to the required position, screw the second bolt 66 into the second threaded hole to fix the position of the stabilizing base 61.

[0042] The above embodiments only illustrate one or more implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A chair leg welding fixture, characterized in that, It includes a welding torch, a base plate (1), a clamping mechanism (2), and a central rod (3); The central rod (3) is located at the center of the base plate (1), and the central ring of the chair leg is fitted onto the central rod (3); The clamping mechanism (2) includes a left clamping block (21), a right clamping block (22), and a switching mechanism (23); The left clamping block (21) and the right clamping block (22) are fixedly connected to the base plate (1). The right clamping block (22) is provided with a cylinder (221) and a first air pipe (223). The cylinder (221) is connected to the switching mechanism (23) through the first air pipe (223). The switching mechanism (23) includes an air storage cylinder, a switching component (231), a second air pipe (232), and an on / off switching lever (233); The switching component (231) is set on the base plate (1). The switching component (231) is connected to the air storage cylinder through the second air pipe (232). The output shaft of the cylinder (221) is connected to the abutment (222). The chair leg is placed between the left clamping block (21) and the abutment (222). The on / off switching lever (233) is mounted on the switching component (231); When the on / off switching lever (233) puts the switching component (231) in the passage, the air tank forms a passage with the cylinder (221) through the first air pipe (223) and the second air pipe (232), and the clamping component (222) abuts against the chair leg with the left clamping block (21). When the switching lever (233) causes the switching component (231) to be in the open circuit, the air reservoir is disconnected from the cylinder (221), and the clamping component (222) is separated from the left clamping block (21).

2. The chair leg welding fixture according to claim 1, characterized in that, A connector (31) is provided under the base plate (1), and the base plate (1) is fixedly connected to the central rod (3) through the connector (31).

3. The chair leg welding fixture according to claim 1, characterized in that, The lower end of the left clamping block (21) is provided with a support member (4) for supporting the chair legs.

4. The chair leg welding fixture according to claim 1, characterized in that, A limit mechanism (5) is provided on the base plate (1); The limiting mechanism (5) includes a threaded rod (51), an anti-detachment component (52), and a limiting component (53); A placement groove is provided on the central rod (3), and the central ring of the chair leg is fitted onto the central rod (3) through the placement groove; The threaded rod (51) is located at the top of the central rod (3), and the anti-detachment part (52) is provided with an anti-detachment slot (521). The anti-detachment part (52) is sleeved on the threaded rod (51) through the anti-detachment slot (521). The limiting member (53) has a first threaded hole, and the limiting member (53) is threadedly connected to the threaded rod (51) through the first threaded hole; When the limiting member (53) and the anti-detachment member (52) are pressed together, the anti-detachment member (52) fixes the central ring of the chair leg.

5. The chair leg welding fixture according to claim 1, characterized in that, A stabilizing mechanism (6) is provided on the base plate (1); The stabilizing mechanism (6) includes a stabilizing base (61) and a first bolt (62), with the stabilizing base (61) disposed on the base plate (1); A through hole is provided on the stable base (61), and the first bolt (62) is inserted into the stable base (61) through the through hole; When the chair leg abuts against the central ring, the first bolt (62) abuts against the end of the chair leg away from the central ring.

6. The chair leg welding fixture according to claim 5, characterized in that, A return spring (63) is fitted onto the first bolt (62).

7. The chair leg welding fixture according to claim 5, characterized in that, The first bolt (62) has a nut (64) threaded onto one end of the hole.

8. The chair leg welding fixture according to claim 5, characterized in that, A strip groove (65) is provided on the stable base (61), and a second threaded hole is provided on the base plate (1), and a second bolt (66) is threadedly connected in the second threaded hole; The second bolt (66) passes through the groove (65) and is threaded into the second threaded hole.

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